This item still needs to be validated !
Title: Efficient electrical spin injection in GaAs: A comparison between AlOx and Schottky injectors
Authors: Van Dorpe, Pol
Van Roy, Willem
Motsny, VF
Borghs, Gustaaf
De Boeck, J #
Issue Date: Jul-2004
Publisher: American Institute of Physics
Series Title: Journal of vacuum science & technology. B, Microelectronics and nanometer structures vol:22 issue:4 pages:1862-1867
Abstract: We demonstrate electrical spin injection in GaAs from ferromagnetic metals through tunneling. We use and compare an AlOx insulating layer as well as the native Schottky barrier at the metal-semiconductor interface as tunnel barriers. The injected spin polarization has been measured by analyzing the electroluminescence polarization using the oblique Hanle effect technique. The observed bias dependence of the measured spin polarization is sensitive to both the type of injector and the doping profile in the semiconductor. Hot electron spin relaxation due to the D'yakonov-Perel spin relaxation mechanism has been identified as the cause of the different bias dependence in two AlOx-based injectors with different doping levels of the active region while a change in the electron transit times in the highly doped interfacial region has been found as the cause of the bias dependence in the Schottky-based injectors. (C) 2004 American Vacuum Society.
ISSN: 1071-1023
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physics and Astronomy - miscellaneous
Associated Section of ESAT - INSYS, Integrated Systems
# (joint) last author

Files in This Item:

There are no files associated with this item.

Request a copy


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science